In this recommendation settings, you will be able to set up the rules for Collection Cross-sell and Promote the product that can be bought again campaigns yourself. These settings help the app understand your product, so it can make the most relevant recommendations to customers. For example, you can choose which collection you want to sell with Jeans/ T-shirt, so our recommendation engine can boost it up. 

To start setting up the rule, please go to Settings tab >> Recommendation Rules. Here you will see all available collections of your store, please identify Cycle of products and Cross-Sell collections for each collection.